168263851376640 has 1088 divisors, whose sum is σ = 574104972091392. Its totient is φ = 42011826585600.

The previous prime is 168263851376597. The next prime is 168263851376651. The reversal of 168263851376640 is 46673158362861.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 171173805589 + ... + 171173806571.

Almost surely, 2^{168263851376640} is an apocalyptic number.

168263851376640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168263851376640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287052486045696).

168263851376640 is an abundant number, since it is smaller than the sum of its proper divisors (405841120714752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168263851376640 is an equidigital number, since it uses as much as digits as its factorization.

168263851376640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232 (or 1202 counting only the distinct ones).

The product of its (nonzero) digits is 209018880, while the sum is 66.

The spelling of 168263851376640 in words is "one hundred sixty-eight trillion, two hundred sixty-three billion, eight hundred fifty-one million, three hundred seventy-six thousand, six hundred forty".